看到雨就怕溪水暴漲 - 健行
By Genevieve
at 2020-09-14T17:23
at 2020-09-14T17:23
Table of Contents
記得很久以前好像有在板上問過這個問題
因為現在搜尋新聞跟網路文章總是寫著下雨=溪水暴漲
導致在溪邊的人一看到下雨就人心惶惶(這倒也不是壞事)。
溪水爆漲有幾個關鍵點
*你在什麼流域?(上游、下游)
*雨下多大多久了?(集水區的飽和度)
*集水區多大(越大集水量越多)
越靠近上游因為集水區匯流而出的水較少,較不用擔心溪水暴漲
反之越下游接收到匯流的水越多,越容易爆漲。
而暴漲的前提是土地吸收飽和水開始大量往下游釋放
土地就像一塊海綿,要吸收飽滿還是需要一定時間
每次看到新聞寫著上游下雨下游溪水暴漲受困就覺得這樣講得太籠統了
(但事實也是這樣沒錯),因為暴漲前還是得需要經過一段時間的吸收期。
我比較想驗證的是倒底有沒有連日好天氣,山下大太陽
結果上游忽然下起雨來,短短的時間造成土地吸收飽和
溪水大量往下釋放形成溪水爆漲。
但總之溪邊溯溪玩耍出遊之前觀看當地天氣
觀察前幾天是否有下過雨,評估活動風險是必要的
好想要有什麼溪水暴漲的研究可以看阿~"~
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